/*
  GuitarPT Jam — the playful sibling of stems.guitarpt.app.
  Same structural skeleton (single 720 px column, dark, no framework)
  so the two sites feel related, but a younger palette: purple→pink
  gradient accents, bigger emoji, bouncier hover states. Target
  audience is TikTok-age; the stems site stays the "workshop", this
  is the "toy".
*/

:root {
  --bg: #0d0b12;
  --bg-elev: #17131f;
  --bg-elev-2: #201a2c;
  --border: rgba(255,255,255,.09);
  --text: #f2eefa;
  --text-mute: #a29ab4;
  --accent: #b465ff;
  --accent-2: #ff5da2;
  --accent-soft: rgba(180,101,255,.14);
  --accent-glow: rgba(180,101,255,.45);
  --grad: linear-gradient(90deg, var(--accent), var(--accent-2));
  --error: #ff5d6c;
  --success: #8be9a3;
  --radius: 16px;
  --shadow: 0 4px 24px rgba(0,0,0,.36);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: radial-gradient(ellipse at top, #1c1526 0%, #0a0810 70%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text",
               "Helvetica Neue", system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.55;
  min-height: 100vh;
  overflow-x: hidden; /* hero blobs bleed past the column on phones */
}

a { color: var(--accent); }
a:hover { color: #cf96ff; }

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

.site-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 24px;
  border-bottom: 1px solid var(--border);
  max-width: 720px;
  margin: 0 auto 32px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
}
.brand:hover { color: inherit; }
.brand__mark {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  filter: drop-shadow(0 0 14px var(--accent-glow));
}
.brand__name { font-weight: 700; letter-spacing: -.02em; color: var(--text); }
.brand__sub {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: .12em;
  font-weight: 700;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
nav { display: flex; align-items: center; gap: 8px; }
.nav-link {
  text-decoration: none;
  color: var(--text-mute);
  font-size: 14px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  transition: all .15s;
}
.nav-link:hover { color: var(--text); border-color: rgba(255,255,255,.18); }

.lang-toggle {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--text-mute);
  padding: 6px 14px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  font-family: inherit;
  transition: all .15s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.lang-toggle:hover { color: var(--accent); border-color: var(--accent); }
.lang-toggle .flag { font-size: 15px; }

[data-lang] { transition: opacity .15s ease; }

/* Hero atmosphere — same drifting-blob trick as the stems site but
   in the jam palette (purple left, pink right). */
.hero { position: relative; isolation: isolate; }
.hero::before,
.hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  border-radius: 50%;
  pointer-events: none;
  will-change: transform;
}
.hero::before {
  width: 460px; height: 460px;
  top: -100px; left: -140px;
  background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
  opacity: .5;
  filter: blur(70px);
  animation: heroDriftA 16s ease-in-out infinite;
}
.hero::after {
  width: 420px; height: 420px;
  top: 100px; right: -160px;
  background: radial-gradient(circle, var(--accent-2) 0%, transparent 70%);
  opacity: .38;
  filter: blur(80px);
  animation: heroDriftB 19s ease-in-out infinite;
}
@keyframes heroDriftA {
  0%   { transform: translate(0, 0) scale(1); }
  25%  { transform: translate(190px, 60px) scale(1.18); }
  50%  { transform: translate(130px, 160px) scale(1.24); }
  75%  { transform: translate(-50px, 110px) scale(1.10); }
  100% { transform: translate(0, 0) scale(1); }
}
@keyframes heroDriftB {
  0%   { transform: translate(0, 0) scale(1); }
  25%  { transform: translate(-90px, 90px) scale(1.10); }
  50%  { transform: translate(-220px, 50px) scale(1.20); }
  75%  { transform: translate(-150px, 180px) scale(1.15); }
  100% { transform: translate(0, 0) scale(1); }
}
@media (prefers-reduced-motion: reduce) {
  .hero::before, .hero::after { animation: none; }
}

.hero h1 {
  font-size: clamp(38px, 6vw, 54px);
  letter-spacing: -.03em;
  margin: 0 0 14px;
  line-height: 1.05;
  font-weight: 800;
}
.lede {
  color: var(--text-mute);
  font-size: 18px;
  margin: 0 0 32px;
}
.lede strong { color: var(--text); font-weight: 600; }

/* ── Uploader ────────────────────────────────────────────────────── */

.uploader {
  background: var(--bg-elev);
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 36px 24px 18px;
  text-align: center;
  cursor: pointer;
  transition: all .18s;
}
.uploader:hover,
.uploader.is-dragover {
  border-color: var(--accent);
  background: var(--accent-soft);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}
.uploader__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.uploader__icon {
  font-size: 32px;
  width: 64px; height: 64px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
}
.uploader__text strong { display: block; font-size: 18px; margin-bottom: 4px; }
.uploader__text span { color: var(--text-mute); font-size: 14px; }
.uploader__limits {
  display: flex;
  justify-content: center;
  gap: 18px;
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  color: var(--text-mute);
  font-size: 13px;
  flex-wrap: wrap;
}
.uploader__limits li::before { content: "·"; margin-right: 10px; color: var(--accent); }
.uploader__limits li:first-child::before { content: ""; margin-right: 0; }

/* ── URL importer ───────────────────────────────────────────────── */

.importer {
  margin-top: 18px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  text-align: left;
}
.importer__head {
  font-weight: 600;
  font-size: 15px;
  margin-bottom: 12px;
}
.importer__url {
  width: 100%;
  box-sizing: border-box;
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: 14px;
  padding: 11px 14px;
  outline: none;
}
.importer__url:focus { border-color: var(--accent); }
.importer__rights {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin: 14px 0 0;
  font-size: 13px;
  color: var(--text-mute);
  cursor: pointer;
}
.importer__rights input {
  margin-top: 2px;
  accent-color: var(--accent);
  flex-shrink: 0;
}
.importer__actions {
  display: flex;
  gap: 10px;
  margin-top: 14px;
  flex-wrap: wrap;
}
.importer__actions .btn[disabled] {
  opacity: .45;
  pointer-events: none;
}
.importer__note {
  margin: 14px 0 0;
  font-size: 12px;
  color: var(--text-mute);
  line-height: 1.5;
}

/* ── MP3-import result ──────────────────────────────────────────── */

.mp3box {
  margin-top: 28px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
}
.mp3box strong { display: block; font-size: 18px; }
.mp3box p { color: var(--text-mute); font-size: 13px; margin: 10px 0 16px; }

/* ── Status ─────────────────────────────────────────────────────── */

.status {
  margin-top: 28px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
}
.status__phase {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.status__phase::before {
  content: "";
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 1.4s ease-in-out infinite;
  box-shadow: 0 0 10px var(--accent-glow);
}
.status__bar {
  height: 6px;
  background: var(--bg-elev-2);
  border-radius: 999px;
  overflow: hidden;
}
.status__bar-fill {
  height: 100%;
  background: var(--grad);
  width: 0%;
  transition: width .3s ease-out;
}
.status__detail { margin-top: 10px; font-size: 13px; color: var(--text-mute); }
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: .35; transform: scale(.85); }
}

/* ── Mixer ──────────────────────────────────────────────────────── */

.mixer {
  margin-top: 28px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}
.mixer__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}
.mixer__head h2 { margin: 0; font-size: 22px; letter-spacing: -.01em; }
.mixer__key {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  background: var(--accent-soft);
  color: var(--accent);
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  border: 1px solid var(--accent);
}
.mixer__key small { opacity: .75; font-weight: 400; }
.mixer__loading {
  display: flex;
  justify-content: space-between;
  color: var(--text-mute);
  font-size: 14px;
  padding: 14px 4px;
}

/* Preset buttons: the emotional core of the page. Big tap targets,
   emoji-led, gradient border on the active one. */
.presets {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(118px, 1fr));
  gap: 10px;
  margin-bottom: 20px;
}
.preset {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 14px 8px 12px;
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  font-family: inherit;
  cursor: pointer;
  transition: all .14s;
}
.preset:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  transform: translateY(-2px);
}
.preset.is-active {
  border-color: var(--accent);
  background: var(--accent-soft);
  box-shadow: 0 0 0 1px var(--accent), 0 4px 18px var(--accent-glow);
}
.preset__emoji { font-size: 26px; line-height: 1.2; margin-bottom: 4px; }
.preset__label { font-size: 13px; font-weight: 700; letter-spacing: -.01em; }
.preset__hint {
  font-size: 11px;
  color: var(--text-mute);
  text-transform: uppercase;
  letter-spacing: .05em;
}

/* Channel strips */
.strips { display: grid; gap: 10px; margin-bottom: 20px; }
.strip {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--bg-elev-2);
  border: 1px solid transparent;
  border-radius: 12px;
  padding: 12px 16px;
  transition: opacity .18s, border-color .18s;
}
.strip.is-muted { opacity: .42; }
.strip__toggle {
  width: 44px; height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  font-size: 20px;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: all .14s;
  flex: none;
}
.strip__toggle:hover { border-color: var(--accent); transform: scale(1.06); }
.strip.is-muted .strip__toggle { filter: grayscale(1); }
.strip__meta { flex: 1; min-width: 0; }
.strip__name { font-weight: 700; font-size: 15px; display: block; }
.strip__state {
  font-size: 11px;
  color: var(--text-mute);
  text-transform: uppercase;
  letter-spacing: .06em;
}
.strip__vol {
  -webkit-appearance: none;
  appearance: none;
  width: 120px;
  height: 4px;
  border-radius: 999px;
  background: var(--bg);
  outline: none;
  flex: none;
}
.strip__vol::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  box-shadow: 0 0 8px var(--accent-glow);
}
.strip__vol::-moz-range-thumb {
  width: 16px; height: 16px;
  border: none;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
}

/* Transport */
.transport {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}
.transport__play {
  width: 54px; height: 54px;
  border-radius: 50%;
  border: none;
  background: var(--grad);
  color: #14101c;
  font-size: 20px;
  font-weight: 700;
  cursor: pointer;
  flex: none;
  display: grid;
  place-items: center;
  transition: transform .12s, box-shadow .12s;
  box-shadow: 0 4px 18px var(--accent-glow);
}
.transport__play:hover { transform: scale(1.06); }
.transport__timeline {
  flex: 1;
  height: 8px;
  background: var(--bg-elev-2);
  border-radius: 999px;
  cursor: pointer;
  overflow: hidden;
}
.transport__progress {
  height: 100%;
  width: 0%;
  background: var(--grad);
  border-radius: 999px;
}
.transport__time {
  font-size: 13px;
  color: var(--text-mute);
  font-variant-numeric: tabular-nums;
  flex: none;
  min-width: 42px;
  text-align: right;
}

.mixdl {
  display: grid;
  gap: 10px;
}
.mixdl__note {
  color: var(--text-mute);
  font-size: 13px;
  margin: 12px 0 0;
}
.mixdl__note--fun {
  font-size: 12px;
  opacity: .8;
  margin-top: 6px;
}

/* ── Buttons ────────────────────────────────────────────────────── */

.btn {
  display: inline-block;
  padding: 13px 22px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  border: 1px solid transparent;
  text-decoration: none;
  transition: transform .12s, box-shadow .12s, background .12s, opacity .12s;
  text-align: center;
  font-family: inherit;
}
.btn--primary {
  background: var(--grad);
  color: #14101c;
  width: 100%;
}
.btn--primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 22px var(--accent-glow);
  color: #14101c;
}
.btn--primary.is-disabled {
  opacity: .4;
  pointer-events: none;
}
.btn--ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }

/* ── Errors ─────────────────────────────────────────────────────── */

.errorbox {
  margin-top: 28px;
  background: rgba(255,93,108,.08);
  border: 1px solid rgba(255,93,108,.4);
  border-radius: var(--radius);
  padding: 22px;
  color: var(--text);
}
.errorbox strong {
  display: block;
  color: var(--error);
  margin-bottom: 6px;
  font-size: 15px;
}
.errorbox p { margin: 0 0 14px; color: var(--text-mute); font-size: 14px; }
.errorbox__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

/* ── App-Store button (shared look with the stems site) ─────────── */

.appstore-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: #000;
  color: #fff;
  padding: 10px 18px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,.16);
  text-decoration: none;
  font-family: inherit;
  line-height: 1;
  transition: transform .12s, background .12s, border-color .12s;
}
.appstore-btn:hover {
  background: #1a1a1a;
  border-color: rgba(255,255,255,.32);
  transform: translateY(-1px);
  color: #fff;
}
.appstore-btn__icon { display: inline-flex; align-items: center; justify-content: center; }
.appstore-btn__text {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
}
.appstore-btn__text small {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: #d0d0d0;
  font-weight: 400;
}
.appstore-btn__text strong {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -.01em;
}

/* ── Content sections ───────────────────────────────────────────── */

.usecases, .howto, .privacy, .chords-teaser {
  margin-top: 64px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}
.usecases h2, .howto h2, .privacy h2, .chords-teaser h2 {
  font-size: 24px;
  letter-spacing: -.01em;
  margin: 0 0 14px;
}
.howto p, .privacy p, .chords-teaser p {
  color: var(--text-mute);
  margin: 0 0 18px;
}
.chords-teaser strong { color: var(--text); }

.howto ol { color: var(--text-mute); padding-left: 20px; }
.howto li { margin-bottom: 10px; }
.howto li::marker { color: var(--accent); font-weight: 600; }

.usecases__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
  margin-top: 8px;
}
.usecase {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: transform .14s, border-color .14s;
}
.usecase:hover { transform: translateY(-2px); border-color: var(--accent); }
.usecase__emoji { font-size: 26px; line-height: 1; margin-bottom: 4px; }
.usecase strong { font-size: 15px; font-weight: 700; letter-spacing: -.01em; }
.usecase p {
  margin: 0;
  color: var(--text-mute);
  font-size: 13px;
  line-height: 1.5;
}

.site-foot {
  text-align: center;
  padding: 30px 24px 50px;
  color: var(--text-mute);
  font-size: 13px;
  border-top: 1px solid var(--border);
  max-width: 720px;
  margin: 60px auto 0;
}
.site-foot a {
  color: var(--text-mute);
  text-decoration: underline;
  text-decoration-color: var(--border);
}
.site-foot a:hover { color: var(--accent); text-decoration-color: var(--accent); }

/* ── Legal pages (same subdued look as the stems site) ──────────── */

.legal { max-width: 680px; padding: 16px 0 40px; }
.legal h1 { font-size: 32px; margin: 0 0 8px; letter-spacing: -.02em; }
.legal h2 { font-size: 20px; margin: 36px 0 10px; letter-spacing: -.01em; color: var(--text); }
.legal h3 {
  font-size: 16px;
  margin: 22px 0 6px;
  color: var(--text-mute);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.legal p, .legal li { color: var(--text); margin: 10px 0; }
.legal__lede { color: var(--text-mute); font-size: 17px; margin: 8px 0 20px; }
.legal__address {
  font-style: normal;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 18px;
  display: inline-block;
  line-height: 1.6;
}
.legal__processors { list-style: none; padding: 0; margin: 12px 0; }
.legal__processors li {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 18px;
  margin: 10px 0;
}
.legal__back { margin-top: 40px; font-size: 14px; color: var(--text-mute); }
.legal__back a { color: var(--accent); text-decoration: none; }
.legal__back a:hover { text-decoration: underline; }
.legal__stand { color: var(--text-mute); font-size: 13px; font-style: italic; margin-top: 28px; }
.legal a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: var(--accent-soft);
}
.legal a:hover { text-decoration-color: var(--accent); }

@media (max-width: 480px) {
  main { padding: 0 16px 60px; }
  .site-head { padding: 16px; }
  .uploader { padding: 28px 16px 14px; }
  .uploader__limits { gap: 12px; font-size: 12px; }
  .mixer { padding: 18px; }
  .presets { grid-template-columns: repeat(2, 1fr); }
  .strip { gap: 10px; padding: 10px 12px; }
  .strip__vol { width: 76px; }
  .usecases__grid { grid-template-columns: 1fr; }
  .errorbox__actions { gap: 8px; }
  .legal h1 { font-size: 26px; }
  .legal h2 { font-size: 18px; }
}